Six fans were arrested following clashes between Manchester United and Leeds supporters before Saturday's game at Old Trafford.
Greater Manchester Police staged a major security operation for the high-risk fixture and had to break up 'isolated incidents of disorder' around the city centre.
During the game, some of the 3,000 Leeds supporters briefly aimed sick taunts about the Munich Air Disaster at their rivals.
Six fans were arrested following clashes between Manchester United and Leeds supporters before Saturday's game at Old Trafford
There were allegations that this was in response to a Turkish flag being thrown into the away end.